Culvert.



C. E. GLASSPOOLE.

OULVBRT.

APPLIOATION FILED MAR.3,1908.

91,703, A 'Patented ot.2o,19os.

A"-i'ilnifran sTATEsPATENT onirica.

CHARLES E. GLAs'srooLE, or sfr. Pro1., MINNESOTA.

cULvER'r.

l'f Nason-70e.

To all'whpgt-may concern:

j Be ity'known that L'OHARLES E. GLASS- 1 POOLE, vajjcitizen of the UnitedStates, resid-V w i ;ng at St." aul, in .the county'of Ramsey and` State of Minnesota, have invented a new and 1 useful Improvement in Culverts, of "which thefollowingis aspecication..

-'My.-invention relates to. an

:nus invemam has to do with that dass o fl v'culverts Whloa's-ireinforced. in strength by I adaptedtofcompletely edrain',.water there` ,i fro` m`", 'frio Yt :jgthe 'se of my-invention it has'beencustomarywhen construct-in cul- .j 7 -vertsouflt.of .sheet metal to use circu en j iallycoi'ngated pipe, the `c orrug'ations pass;l 225 1ing completely around its surface and the in- 7 terstices-between-said corrugationsretainin a'4 certain amount of the drainage whic 'tendsto attack and rust the metal. My in'- vention completely overcomes objection in a simple `and eiective manner Eat the same time. increases the strengtlild mini- 'mizes the costof construction and reduces theJl wearand friction against water drained by the culverth 1 -By 'reducing the` friction, the c'aac'ty'of the culvert is very much in-A creasel 'Itfw'ill be noted that l1nv culverts4 employing circumferential corrugations a whlrlingeiect is imparted to the Water passing through` it, while'my inventionallows the water to passyfreely. through without whirl- I so 1D r z n the accom anying drawings, forming part of this speci lcation: Figure 1 isa longitudinal section showing the ends of detail portions of two lengths of my improved culvert joined together: Fig. 2 is a side view showing detail portions of two lengths of my imjiroved culvert separated and in readiness to e joined together: Fig. 3" is va cross sectinalvi'ew of a modified construction, the line of section being indicated b X-X shown'in Fig. 1; Fig. 4 is a plan o a detail lortion of a sheet of material corrugated and `in readiness to have its side edges turned and secured together to form a part of a length of Specification. of v"Letters Patent. 1 Appuaziop mea mmh s, 190s.- seriai No. 418,941.

' any ot its particular. construction'and which is` retreated oct. 2 0, 190s.

culvert; Fig. 5 is a longitudinal section of culvert showing a modified construction, and

Eig. G .is a4 ransverse section taken on the hne Y-Y o `ig. 5l

In the drawings A represents a' section of culvert having my invention which is in the f orm of a pipe the ends of lengths 2 and 3 'of which are joined together in the following manner to form a complete line of culvert;

.The section of culvert as shown is provided with upper and lower longitudinal parts which 'are' respectively corrugated at 4 and. .smooth at` 5 t e corrugations of the former running transversely and in .cross section ap- `pearmglin the form of reverse curves, o r of er suitable form' or shape desired for` the purp'se of reinforcing the strength of the` thin sheet metal or other material out 4of whichthe culvert is preferably made.

Y The 'upperand lower parts of the culvert. are intgral being made out of a single sheet of material. The sides of the sheet are connected by a lap joint B. the parts of which are .secured to ether-by means of -rivets 6. welding or botl as desired. The lower part ofthe culvert has a smooth inner surface and is not rovided with corru ations, -so that when t e culvertis in use a 'of the Waterin it flows out and is notheld by the intersti'ces between corru ations as when the latter entireliy encircle t e culvert.

T to nearly circumscribe the culvert when desired but never entirely encircle the culvert within the scope of my invention. The

method of joining thelengths at (l as shown consists of securing one. end of the length 2 over the vadjoining end of .length 3. VAfter these parts are connected in the .manner described the rivets are secured in place to complete the joint B.,

vIn the modified construction shown in Fig.

3 the lower or smooth portion ofthe endsof the culvert at the joint C are secured ether by rivets 6 for the purpose of increase `corrugations may be varied in length? ing the strength of the joint and it isobvious that this method' of securing 4the parts together may be varied as desired.

In forr'mn the sheet to make the culvert out of a sing e piece .of material, the corrugations are ressed into the sheet while lyln flat and efore it is bent into cylindrica shape and in order to revent distortn the lane ofthe material t e sheet is held 4rmly in place by jaws -nr other'suitable means so Q COPY 901,703v

that, the dies or forming tools produce the .Y ner surface, the side edges of seid sheet bein nrrugntions by. stretching the metal into i secured together and forming a longitudine.

sha Je.'

hilo this culvert is shown of substen.- tially hollow cylindrieui shape yet it is obviof e. single piece of sheet meta-l ous that it may be made of any suitable cross sectional design desired and the-t the corrugated part muy extend a greater or less distance up or down at the sides of the culvert.

It is also obvious that the culvertinay bef' curved orotherivise shaped longitudinall'y3g Whenidesired and While described es being mede out of metal it may be Inadesuccess-- fully out of other suitable' material.

`In Fig. 5, longitudinalcorrugation 7,is

formed in each side of the culvert for the purpose of allowing expansion and contraction ofthe materiel. Such longitudinal corruga- .l tions-'it will be noticed do not tend -toob-.g structthepissage or hold any waterin inte'rstices as witli trun'sverse' cirrugutions. "In

this constructioiitili'e cl'ilvert is formed with e.

'bra-zedoint et its side in accordance with the above escription.

' InI accordance With the etent statutes l i joint, for the purposes spe ,ied.

for thepurposes specified. u 5. A culvert of the class set forth, comprising, two lengths the ends of Whiehlbeing Ling n; pipel having upper and lower integral ini-its, the upper part having u 'series oftrans posesI specified. Y. o

. 6. cu'lvert of the class set forth, comprising asingle piece of-'sheet-nn1terial h'iviAJ'ig-o longitudinal series of'ltifiiiisvers corrugations at one sideend a longitudinal 'smootlisurfuce fig-djoining seidcorrugations, the'side edges of gitudinal smooth inner surface, forV the 'purposes specified.

7. A culvert in the-form oto pipefmademut have described the princi eof. operationof f of vthinn xriaterinl havinge'rei'nforced upper myjnvention together Wit ithe constructionl longitudinal part zuid-'a llower longitudinalwhich' i nowfconside'rjto represent `the best embodimentthereof, 4but I ,desire to lhave it understood that. the construction shown `is only illustrative and that the invention can be corried out'by other mens and a plied to uses othfe'r'than those above, set forth?, 'wlitliin the scopeof the following c aims.

Having described my invention, vv vhot I '1. A device of the class set-forth, compris- -ing ze *pipe having longitudinal upper and lower integral parts, sind .u per art h ving tronsverse-corrugutiens an sai lower part an inner smooth surface,` forthev purposes specified 2: A culvert of the class set forth', comprising, a sheet motel pipe lm-vingupper and lower integral parts', said upper part heilig intersticed. to reinforce the strength of the culvert und seid loiv'er part having u smooth inner surface, forthe )urposes specified.

A culvert of the class setforth, com )rising, :i pipe marde out of a thinsheet 'and uving upper end lower parte, said upper part having a. series'of transverse corrugations end said lower pu rt a longitudinul smooth inl part having a srnoothf inner surface und e )oint securing the' parts of seid sheet together.

of :n.,single sheet of nnrterial-'heving eroin- I.ff'irc-ed'k upper longitudinal lpart and @lower said parts having e' longitudiholcorrugation.

" claim as new'and desire to protect by Letters te'gral Wall'hoving a transversely corrugatedl "Patent, is'z- 'z l upper'j surface, and u', smooth' longitudinal lovver surface forthe'pu'rposes specified.

v10. A'device ofthe class set forth, comprising,` o culvert in the forni of o. ipe made l, out of a single piece of sheetznietu. land lmfv getlier longitudinally at one side of thupipe, for the purposeszsiecitied. V

vIn testin10ny `iv1ereof, l have signed my name 'to this lspeligait:in.' in'ftlie 'presence of two subscribing Witnesses. i. CHARLES E. G-LASP( )OLE Witnessesf' i j H. L.F1soin:n,

8. vA culvert-'inthe form of a pipe milde out y k -ing upper und lower pzirts 4 :ind 5,'suid upperpart having series of transverse corrugzitions `4and sziidlower part nlongitudinally smooth V, inner surfu'oeij, said 4parts beingjoined "to- 4. A culvert in the form of n )ipe made out l liu-vin o rein-- forced upper longitudinal part provi ed with transverse corrugntions and a lower part hm'- ing u longitudinally smooth 'inner suITCe,

`ioined together, each of said lengths compris-v verse corrug'otions and the lower part n lonsnidsheet'b'eing' joined together, folf'the purpart ,hnvinguaismooth innersurface',l one of 9. A' culvert comprising ai. su rroundlng in' 

